I already have a 2.25" straight single pipe from the manifold back. the problem is there isnt a hole to put in the split air pipe. do i need to put the split air pipe welded on it or what?

 

Yes.



Bah! Ditch it!

 

i had it welded on after the RB header. My secondaries still functioned perfectly...thank god for that! i had a friend who had an 89 with a similiar setup but wired open his secondaries, and i would beat him. I personally would never wire the secondaries open.

 

So i gotta get a hole drilled in the exhaust pipe and weld the split air it? Where should i do it at? nearer the header the better?

 

i think racing beat sells a flange for it so you can have it bolt on just like a stock setup.

 

well does it absolutely, positivey have to be put on?

 

On a S4 NA it has to be on to make the aux. ports open up. Unless you make them up a different way, such as using the air pump, or servos.

 

No. It doesnt.



You can always wire your 6 ports open. However, doing so will cause you to have less overall power ( area under the curve ) and will result in a slower car.

 

not necessarily a slower car, but your bottom end will be pretty bad. Top end will be about the same, and you will have horrible gas mileage.



Like i said, i would put it on, but thats all up to you...



If you do put it on, you can either get this http://www.racingbeat.com/resultset....rtNumber=16206



or do what i did... Cut a hole, and weld it on after the header. Doesnt really matter where, just as long as it isnt on the header itself, it should have pressure from both ports...

 

Even if you have to spend the $30 or less to have some guy drill the hole and weld it on there, I'd say it's worth it.